Ring dial



Dec. 14 ,1926. 1,610,533

I v E. POZZI I RING DIAL Filed March 30, 1925 Fli MAR INVENTOR fkfli/vfa/Lpo 9022/ ATTORNEYS Patented Dec. 14, 1926.

UNITED STATES ERMENEGILDO POZZI, OF LAG-UNITAS, CALIFORNIA.

RING DIAL.

Application filed March 30,1925. Serial No. 19,384.

The present invention relates to sun dials and has specific reference'to instruments of that type known as ring dials. The general object of the invention is to adapt a ring dial for accurately indicating time in the presence of direct sunlight without providing any increase in the dimensions of the instrmnent above those now required in an ordinary ring dial.

Other objects will appear and be better understood from that embodiment of the invention of which the following is a specification, reference being had to the accompanying drawings forming part thereof, and in which Figure 1 is a perspective view of the invention. V

Figure 2 is a transverse section taken in the plane of the circumference of the body.

Figure 3 is a view at right angles to Figure 2 and looking in the direction of the arrows.

Figure 4 is a View similar to Figure 2 taken on the line IVIV of Figure 2 and r looking in the direction of the arrows, and

Figure 5 is a side elevation of the device.

The annular body 5 is relatively broad in proportion to its diameter and is preferably though not necessarily, formed of metal as, for instance, brass, which may be rendered attractive by a coating of lacquer or nickel. The area of the body 5 is such as will permit the user to carry the instrument asa whole in an ordinary garment pocket. W1th1n the body 5 is an arcuate shaped strip 6 preferably of metal corresponding to the body 5. The radius of strip 6, as shown in Figures 1 and 2, is shorter than the radius of body 5 and at one end the strip is so connected to the upper portion of body 5, as viewed in Figure 1, that the'surfaces of the strip and body merge one into the other. The lower end portion of the strip 6, as viewed in Figures 1 and 2, terminates in alinement with the diameter of .body 5 and is connected thereto by a radially disposed extension 7.

The provision of the extension 7 disposes the curve of strip 6 eccentric to the curve of body 56 A slot 8 is formed in body 5 and located opposite to strip 6 and in length conforms substantially to the length of strip 6. An annulus 9 is slidably fitted in a circumferential groove in the outer face of body 5, as clearly shown in Figures 1 to 5 inclusive. A knob 10 is provided for the finger hold in the operation of turning the annulus and, as shown in Figure 2, the knob is disposed substantially opposite to a small hole 11 formed in the middle portion of the annulus so as to aline with the slot 8 when the segment of the annulus provided with the hole is arranged over the said slot 8. On the outer surface of a segment of the body on either side of the slot 8, there are divisions 12 indicating the months of the year and on the strip 6 there are also divisions 13 indicating the hours of the day in which the sun is di rectly visible. The early and late hours corresponding to those nearest to sunrise and sunset are indicated on opposite sides of the upper end of strip 6, and the intervening hours are indicated below these, the meridian or noon hour being indicated at the lower middle portion of the strip. It will be noted that except for the noon hour, the indications for the aforesaid intervening hours are located on opposite sides of the strip, those corresponding to the morning hours being located on one side and the afternoon hours on the other side of the strip. A hanger 14: in the form of a chain is provided and connected to a yoke 15 and located in the middle of the upper segment of the body 5.

In the use of the device the annulus 9 is turned until the opening 11 is arranged opposite the division indicating the current month. The device is then held suspended from the hanger 14 and turned until the opening 11 faces the sun. The rays of the sun are now permitted to pass into the in terior of the body through the opening 11 and the hour of the day is denoted where the beam of light, indicated by dotted lines in Figure 1, strikes the strip 6.

Although I have described one form of the invention, it is to be understood that the same i 'sus eptible of changes or adjustportion further having a peripheral groove, a curved strip disposed eccentrically Within the body and provided With divisions denoting hours of the day, a slidable annulus completely filling the space of the groove and flush with the periphery of the body and provided With an opening, and a flexible hanger connected to the body.

ERMENEGILDO POZZI. 

